CN112294509A - Vascular stent retrieval device - Google Patents

Abstract

Translated fromChinese

本发明公开了一种血管支架回收装置，包括回收管、沿轴向可移动的插装在回收管内的定位管及沿轴向可移动的插装在定位管内的锁紧管；定位管的前端经由回收管的前端伸出，且定位管的前端设有弹簧管；锁紧管的前端经由定位管的前端伸出，且锁紧管的前端设有锁紧锥；锁紧管相对定位管向后移动时，锁紧锥退入并撑开弹簧管，回收管相对定位管和锁紧管向前移动时可将血管支架收入回收管的前部。具有结构简单、使用方便，能够顺利取出血管支架的特点。

The invention discloses a vascular stent recovery device, comprising a recovery tube, a positioning tube which is movable along the axial direction and inserted in the recovery tube, and a locking tube which is movable in the axial direction and is inserted into the positioning tube; the front end of the positioning tube Extend through the front end of the recovery tube, and the front end of the positioning tube is provided with a spring tube; the front end of the locking tube extends through the front end of the positioning tube, and the front end of the locking tube is provided with a locking cone; the locking tube is opposite to the positioning tube. When moving backward, the locking cone retracts and spreads the spring tube, and when the recovery tube moves forward relative to the positioning tube and the locking tube, the vascular stent can be received in the front part of the recovery tube. The utility model has the characteristics of simple structure, convenient use, and can take out the vascular stent smoothly.

Description

Vascular stent recovery device

Technical Field

The invention belongs to the technical field of surgical instruments, and particularly relates to a vascular stent recovery device.

Background

Cardiovascular disease (CVD) refers to diseases associated with the heart or blood vessels. Generally, the heart disease comprises coronary heart disease, cerebrovascular disease/stroke, hypertensive heart disease, rheumatic/rheumatoid heart disease, congenital heart disease, aneurysm, cardiomyopathy, endocarditis, deep vein thrombosis, pulmonary embolism, peripheral artery and vein diseases and the like. Due to its minimal invasiveness, safety and effectiveness, stenting is currently the mainstay of treatment for vascular stenosis. The metal stent exists in the blood vessel for a long time, has negative effects on the reconstruction of the endothelium of the blood vessel wall and has certain influence on the normal contraction and relaxation of the blood vessel. Particularly, when the in-situ vascular restenosis of the stent occurs, a new stent is difficult to be unfolded inside the original metal stent, so that obstacles are added to secondary treatment. Studies have shown that vascular stents do not have any significance in vivo when vascular function is restored. In addition, the blood vessel support is a pocket-shaped blood vessel support made of memory metal, generally stored at low temperature, the blood vessel support in the low temperature state is in a closed soft state, and is unfolded by a balloon and the like after being placed into a human body, in the process, the blood vessel support can be quickly hardened due to the influence of the temperature in the human body, and if the blood vessel support is not rightly placed before being hardened, the support needs to be taken out and a new blood vessel support is placed. But removal is difficult because the stent has become rigid. Therefore, the stent is safely and smoothly recycled to the outside of the body, and the problem to be solved by the current recyclable vascular stent is solved.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the vascular stent recovery device which is convenient for safely recovering the vascular stent.

In order to achieve the purpose, the invention adopts the technical scheme that: a vascular stent recovery device comprises a recovery tube, a positioning tube which can move along the axial direction and is inserted in the recovery tube, and a locking tube which can move along the axial direction and is inserted in the positioning tube; the front end of the positioning pipe extends out of the front end of the recovery pipe, and the front end of the positioning pipe is provided with a spring pipe; the front end of the locking pipe extends out of the front end of the positioning pipe, and the front end of the locking pipe is provided with a locking cone; when the locking pipe moves backwards relative to the positioning pipe, the locking cone retreats and props open the spring pipe, and the blood vessel support can be collected into the front part of the recovery pipe when the recovery pipe moves forwards relative to the positioning pipe and the locking pipe.

The device further comprises a control handle, the rear end of the positioning pipe is connected with the control handle, a control button used for controlling the locking pipe to move back and forth relative to the positioning pipe along the axial direction is arranged on the control handle, and a pushing seat used for controlling the recovery pipe to move back and forth relative to the positioning pipe along the axial direction is also arranged on the control handle.

Furthermore, a first guide groove is formed in the control handle and arranged along the axial direction of the recovery tube, the pushing seat is arranged in the first guide groove and matched with the first guide groove in a sliding guide mode, and the pushing seat is connected with the recovery tube.

Furthermore, the locking device also comprises a screw rod arranged at the rear end of the locking pipe along the axial direction of the locking pipe, a guide sheet is arranged at the front part of the screw rod, and a locking nut is connected with the rear part of the screw rod in a threaded manner; the control handle is further provided with a second guide groove in a staggered mode in the first guide groove, the second guide groove is formed in the axial direction of the locking pipe and is in sliding guide fit with the guide piece, and when the locking nut is rotated, the screw rod can drive the locking pipe to move back and forth relative to the positioning pipe along the axial direction.

Furthermore, a first positioning groove is formed in the control handle, a positioning ring is arranged at the rear end of the positioning tube, and the positioning ring is clamped in the first positioning groove and is axially limited by the first positioning groove.

Compared with the prior art, the invention has the following technical effects: the invention relates to a blood vessel support recycling device, which is characterized in that in an initial state, a spring tube is positioned outside the front end of a recycling tube, a locking cone is positioned outside the front end of the spring tube, the blood vessel support recycling device enters a target position of a human body, after a positioning tube axially extends into a blood vessel support, the locking tube is controlled to move backwards relative to the positioning tube until the locking cone retreats into the spring tube and props the spring tube (the number of turns of the spring tube is reduced due to the extrusion of the locking cone, and the radial dimension of the propped spring tube is larger than that of an inlet at the rear end of the blood vessel support, the spring tube is tightly connected with the locking cone and clamps the blood vessel support to prevent the spring tube from moving at the moment, then the recycling tube is pushed to take the blood vessel support into the recycling tube, the blood vessel support recycling device can be taken out after the blood vessel support is taken in the recycling tube, and the recycling of, Convenient use and can smoothly take out the vascular stent.

Drawings

Fig. 1 is a schematic structural diagram of a vascular stent retrieval device in an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a vascular stent retrieval device in an embodiment of the present invention.

Fig. 3 is a structural schematic view of a control handle of the blood vessel stent recovery device in the embodiment of the invention.

Fig. 4 is a schematic view of a stent retrieval device according to an embodiment of the present invention (in a state where the spring tube is not expanded).

Fig. 5 is a schematic view of a stent retrieval device according to an embodiment of the present invention (in a state where a spring tube is expanded).

Fig. 6 is a schematic structural diagram of a pushing seat base of the blood vessel stent recovery device in the embodiment of the invention.

Fig. 7 is a schematic structural view of the upper cover of the pushing seat of the blood vessel stent recovery device in the embodiment of the invention.

The reference numbers in the figures are: 1. the blood vessel support comprises a blood vessel support, 2 parts of a guide wire, 3 parts of a locking pipe, 3-1 parts of a locking cone, 3-2 parts of a screw rod, 3-3 parts of a guide sheet, 4 parts of a positioning pipe, 4-1 parts of a spring pipe, 4-2 parts of a positioning ring, 5 parts of a recovery pipe, 5-1 parts of a recovery pipe seat, 6 parts of a control handle, 7 parts of a first guide groove, 8 parts of a pushing seat, 8-1 parts of a base, 8-2 parts of a buckle, 8-2-1 parts of a vertical plate part, 8-2-2 parts of a hook part, 8-3 parts of an upper cover, 9 parts of a first positioning groove, 10 parts of a second positioning groove, 11 parts of a locking nut, 12 parts of a handle cover, 13 parts of a second guide groove and 14 parts.

Detailed Description

The present invention is not limited to the following embodiments, and those skilled in the art can implement the present invention in other embodiments according to the disclosure of the present invention, or make simple changes or modifications on the design structure and idea of the present invention, and fall into the protection scope of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The embodiment of the invention is shown in fig. 1 to 5, and a vascular stent recovery device comprises arecovery tube 5, apositioning tube 4 inserted in therecovery tube 5 in an axially movable manner, and alocking tube 3 inserted in thepositioning tube 4 in an axially movable manner; the front end of thepositioning tube 4 extends out of the front end of therecovery tube 5, and the front end of thepositioning tube 4 is provided with a spring tube 4-1; the front end of thelocking pipe 3 extends out of the front end of thepositioning pipe 4, and the front end of thelocking pipe 3 is provided with a locking cone 3-1; when thelocking tube 3 moves backwards relative to thepositioning tube 4, the locking cone 3-1 retreats and props open the spring tube 4-1, and when therecovery tube 5 moves forwards relative to thepositioning tube 4 and thelocking tube 3, theblood vessel support 1 can be collected into the front part of therecovery tube 5.

Still includebrake valve lever 6, the rear end and thebrake valve lever 6 ofregistration arm 4 are connected, are equipped with on thebrake valve lever 6 to be used for controlling thelocking pipe 3 along the control button of axial back-and-forth movement relative toregistration arm 4, still are equipped with on thebrake valve lever 6 to be used for controlling thepromotion seat 8 of therelative registration arm 4 ofrecovery tube 5 along the axial back-and-forth movement.

Specifically, thecontrol handle 6 is provided with a first guide groove 7, the first guide groove 7 is arranged along the axial direction of therecovery tube 5, the pushingseat 8 is arranged in the first guide groove 7 and is in sliding guide fit with the first guide groove 7, and the pushingseat 8 is connected with therecovery tube 5. More specifically, asecond positioning groove 10 is arranged in the pushingseat 8, a recovery tube seat 5-1 is arranged at the rear end of therecovery tube 5, the recovery tube seat 5-1 is located in thesecond positioning groove 10, and thesecond positioning groove 10 has an axial limiting effect on the recovery tube seat 5-1, so that therecovery tube 5 and the pushingseat 8 are fixed relatively. The recovery pipe holder 5-1 has a through hole penetrating the front and rear end faces thereof so that the front end of thepositioning pipe 4 is inserted into therecovery pipe 5 through the through hole. More specifically, the pushingseat 8 is composed of a base and an upper cover buckled on the base, semicircular grooves are formed in the base and the upper cover in sequence, and the two semicircular grooves jointly enclose a through hole for thepositioning tube 4 to pass through. Thesecond positioning groove 10 is arranged in a semicircular groove on the base 8-1, two sides of the groove top of the second positioning groove are respectively provided with a buckle 8-2 along the axial direction, the buckle 8-2 comprises a vertical plate part 8-2-1 and a hook part 8-2-2, the vertical plate part 8-2-1 is formed by upward extending of the groove top of the second positioning groove, and the hook part 8-2-2 is a hook shape formed by bending the top of the vertical plate part outwards. The top of the outer wall of the two sides of the semicircular groove on the base 8-1 is provided with an axial gap, and the pushingseat 8 realizes sliding guide with the first guide groove 7 through the gap. The upper cover is provided with a cover hole corresponding to the buckle 8-2, the cover hole is in buckle fit with the buckle 8-2, namely after the buckle 8-2 is inserted into the cover hole, the hook part 8-2-2 extends out of the cover hole and the top of the hole wall outside the cover hole of the hook part.

The locking device also comprises a screw rod 3-2 which is arranged at the rear end of thelocking pipe 3 along the axial direction of thelocking pipe 3, the front part of the screw rod 3-2 is provided with a guide sheet 3-3, and the rear part of the screw rod 3-2 is connected with alocking nut 11 which is used as a control button in a threaded manner; thecontrol handle 6 is also provided with asecond guide groove 13 staggered with the first guide groove 7, thesecond guide groove 13 is arranged along the axial direction of thelocking pipe 3 and is in sliding guide fit with the guide sheet 3-3, and when thelocking nut 11 is rotated, the screw 3-2 can drive thelocking pipe 3 to move back and forth along the axial direction relative to thepositioning pipe 4.

Thecontrol handle 6 is provided with afirst positioning groove 9, the rear end of thepositioning tube 4 is provided with a positioning ring 4-2, the positioning ring 4-2 is clamped in thefirst positioning groove 9 and is axially limited by thefirst positioning groove 9, and therefore thepositioning tube 4 is relatively fixedly arranged in thecontrol handle 6. More specifically, the mounting groove has been seted up atcontrol handle 6's rear portion,first positioning groove 9 sets up in the mounting groove, and the notch lock of mounting groove is equipped withhandle lid 12 for further spacing afterregistration arm 4 installs.

The working principle of the control handle of the embodiment is as follows: thepositioning tube 4 explained in the invention is inserted into therecovery tube 5, then thelocking tube 3 is inserted into thepositioning tube 4, then therecovery tube 5 is inserted into the handle, the pushingseat 8 is placed into thehandle 6, the recovery tube seat 5-1 is placed into thesecond positioning groove 10, and then thecover hole 14 is connected and fixed by passing through the buckle 8-2. Then the positioning ring 4-1 is placed in thefirst positioning groove 9, and the positioning sheet 3-3 fixed on thelocking pipe 3 is placed in thesecond guide groove 13. Thelock nut 11 is screwed into the screw 3-2 and fixed. When thenut 11 is rotated clockwise, thenut 11 forces the screw rod 3-2 to generate linear motion along the axial direction, so that thelocking tube 3 drives the locking cone 3-1 to move, and the movement of the clamping mechanism of the intravascular stent is completed.

In the initial state of the blood vessel stent recovery device of the embodiment, the spring tube 4-1 is positioned outside the front end of therecovery tube 5, and the locking cone 3-1 is positioned outside the front end of the spring tube 4-1. The inner hole of thelocking tube 3 is used as a guide wire hole for inserting aguide wire 2 for guiding when in use, specifically, theguide wire 2 extends into the vascular stent through the entrance at the rear end of the vascular stent with the aid of a medical imaging device, and then thelocking tube 3 on the vascular stent recovery device in the initial state of the embodiment is passed through theguide wire 2, and the vascular stent recovery device is passed into thevascular stent 1 with the aid of the imaging device (as shown in fig. 4). When the blood vessel support 1 completely penetrates into the spring tube 4-1 on thepositioning tube 4, the blood vessel support recovery device is fixed. Further, thelocking nut 11 is rotated clockwise, the screw 3-2 fixed at the tail part of thelocking pipe 3 generates axial displacement when receiving the spiral driving force of thelocking nut 11, thereby pulling the locking cone 3-1 to move axially until the locking cone 3-1 retreats into the spring tube 4-1, and the spring tube 4-1 is expanded, the radial dimension of the expanded spring tube 4-1 is larger than the radial dimension of the inlet at the rear end of theintravascular stent 1, at the moment, the spring tube 4-1 is tightly connected with the locking cone 3-1 and clamps theintravascular stent 1 to prevent theintravascular stent 1 from moving (as shown in figure 5), the pushingseat 8 is pushed to enable therecovery tube 5 to move forwards relative to theintravascular stent 1 until theintravascular stent 1 is completely collected into therecovery tube 5, and theintravascular stent 1 recoverer can be taken out after theintravascular stent 1 is completely collected into therecovery tube 5 to complete the recovery of theintravascular stent 1. The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and their concepts should be equivalent or changed within the technical scope of the present invention.

Claims (7)

1. A vascular stent recovery device is characterized in that: comprises a recovery pipe (5), a positioning pipe (4) which can move along the axial direction and is inserted in the recovery pipe (5) and a locking pipe (3) which can move along the axial direction and is inserted in the positioning pipe (4); the front end of the positioning pipe (4) extends out of the front end of the recovery pipe (5), and the front end of the positioning pipe (4) is provided with a spring pipe (4-1); the front end of the locking pipe (3) extends out of the front end of the positioning pipe (4), and the front end of the locking pipe (3) is provided with a locking cone (3-1); when the locking pipe (3) moves backwards relative to the positioning pipe (4), the locking cone (3-1) retreats and props open the spring pipe (4-1), and when the recovery pipe (5) moves forwards relative to the positioning pipe (4) and the locking pipe (3), the blood vessel support (1) can be collected into the recovery pipe (5).

2. The device for recycling a vascular stent of claim 1, wherein: the spring tube (4-1) is formed by winding a round wire or a flat wire.

3. The vascular stent retrieval device of claim 1 or 2, wherein: the device is characterized by further comprising a control handle (6), the rear end of the positioning pipe (4) is connected with the control handle (6), a control button used for controlling the locking pipe (3) to move back and forth relative to the positioning pipe (4) along the axial direction is arranged on the control handle (6), and a pushing seat (8) used for controlling the recovery pipe (5) to move back and forth relative to the positioning pipe (4) along the axial direction is further arranged on the control handle (6).

4. The vascular stent retrieval device of claim 1 or 2, wherein: be equipped with first guide way (7) on brake valve lever (6), the axial setting of recovery tube (5) is followed in first guide way (7), promote seat (8) and set up in first guide way (7) and with first guide way (7) sliding guide cooperation, promote seat (8) and be connected with recovery tube (5).

5. The vascular stent retrieval device of claim 1 or 2, wherein: the locking device is characterized by further comprising a screw rod (3-2) arranged at the rear end of the locking pipe (3) along the axial direction of the locking pipe (3), a guide sheet (3-3) is arranged at the front part of the screw rod (3-2), and a locking nut (11) used as a control button is connected to the rear part of the screw rod (3-2) in a threaded manner; the control handle (6) is further provided with a second guide groove (13) in a staggered mode in the first guide groove (7), the second guide groove (13) is formed in the axial direction of the locking pipe (3) and is in sliding guide fit with the guide sheet (3-3), and when the locking nut (11) is rotated, the screw rod (3-2) can drive the locking pipe (3) to move back and forth relative to the positioning pipe (4) along the axial direction.

6. The vascular stent retrieval device of claim 1 or 2, wherein: the control handle (6) is provided with a first positioning groove (9), the rear end of the positioning tube (4) is provided with a positioning ring (4-2), and the positioning ring (4-2) is clamped in the first positioning groove (9) and is axially limited by the first positioning groove (9).

7. The vascular stent retrieval device of claim 1 or 2, wherein: the inner hole of the locking tube (3) is used as a guide wire hole and is used for inserting a guide wire (2) for guiding when in use.

Images